<template>
  <div class="home-container">
    <!-- 导航栏 -->
    <van-nav-bar class="app-nav-bar">
      <van-button
        slot="title"
        class="search-btn"
        icon="search"
        type="info"
        round
        size="small"
        to="/search"
      >搜索</van-button>
    </van-nav-bar>
    <!-- /导航栏 -->

    <!-- 文章频道列表 -->
    <van-tabs v-model="active" class="channel-tabs">
       <van-tab
        v-for="channel in channels"
        :title="channel.name"
        :key="channel.id"
        class="tab-item"
       > 
       
       <ArticleList :channel="channel"/>
       </van-tab> 
       <!-- 汉堡按钮定位把列表最后的位置给挡住了，解决办法就是在这里添加一个占位元素 -->
      <div slot="nav-right" class="wap-nav-palceholder"></div>

     <div slot="nav-right"
     @click="isChannelEditShow=true"
     class="wap-nav-warp"
     >
       <van-icon name="wap-nav" size="0.88rem" />
       </div> 
    </van-tabs>

  
    <!-- /文章频道列表 -->
  <van-popup
  v-model="isChannelEditShow"
  position="bottom"
  class="channel-edit-popup"
  closeable
  close-icon-position="top-left"
  get-container="body"
  style="height: 100%"
>
<channel-edit 
 :userChannels="channels"
 :active="active"
 @close="isChannelEditShow=false"
 @update-active="onUpdateActive"
 >
  
</channel-edit>
</van-popup>
 
  </div>
</template>

<script>
import {getUserChannels} from '@/api/user'
import  ArticleList from './components/article-list'
import ChannelEdit from './components/channel-edit'
import { mapState } from "vuex"
import {getItem} from '@/utils/storage'

export default {
  name: 'HomeIndex',
  components: {ArticleList,ChannelEdit},
  props: {},
  data () {
    return {
      active: 0, // 控制被激活的标签
      channels:[],
      isChannelEditShow: false
    }
  },
  computed: {
    ...mapState(['user'])
  },
  watch: {},
  created () {
    this.getUserChannels()
  },
  mounted () {},
  methods: {
   async getUserChannels(){
          try {
    let channels = []
    if (this.user) {
      // 已登录，请求获取线上的频道数据
      const { data } = await getUserChannels()
      channels = data.data.channels
    } else {
      // 未登录
      const localChannels = getItem('channels')
      if (localChannels) {
        // 有本地频道数据，则使用
        channels = localChannels
      } else {
        // 没有本地频道数据，则请求获取默认推荐的频道列表
        const { data } = await getUserChannels()
        channels = data.data.channels
      }
    }

    // 将数据更新到组件中
    this.channels = channels
  } catch (err) {
    console.log(err)
    this.$toast('数据获取失败')
  }
      
    },
  onUpdateActive(index)
  {
     this.active=index;
  }
  }
}
</script>

<style scoped lang="less">
.home-container {
  /deep/ .van-nav-bar__title {
    max-width: none;
  }
  .search-btn {
    width: 277px;
    height: 32px;
    background: #5babfb;
    border: none;
    .van-icon {
      font-size: 16px;
    }
    .van-button__text {
      font-size: 14px;
    }
  }

  .channel-tabs {
  /deep/ .van-tab {
    border-right: 1px solid #edeff3;
    border-bottom: 1px solid #edeff3;
  }
  /deep/ .van-tabs__line {
    bottom: 20px;
    width: 15px !important;
    height: 3px;
    background: #3296fa;
  }
  .wap-nav-warp
  {
    position:fixed;
    right: 0%;
    background-color: #fff;
    opacity: .9;
     width: 33px;
     /deep/ .van-icon{
        font: 33px !important;
     }
  }
  .wap-nav-palceholder{
    width: 33px;
    flex-shrink: 0;
  }

}
}
</style>